Cannot boot into snapshots after the update

[BluishHumility]

This recent thread bears some similarities to yours:

System won't boot and snapshots not working

I am writing from my phone, so please excuse the poor format or the lack of a garuda-inxi output. I will provide screenshots (literally) for what little help it might bring. A few hours ago, I wanted to install a amd-ffmpeg-git version that would allow me to use hardware acceleration for video compression. To avoid conflicts, I uninstalled ffmpeg using octopi. It seems that ffmpeg took with itself half of the system as dependencies (I should have cancelled when I saw the list, but it's too late…

Try switching to a TTY and restoring a snapshot from the command line as described in that thread and see if you have any better luck.